Valve for internal-combustion engines.



A. G. CLARK.

VALVE FOR INTERNAL COMBUSTION ENGINES. APPLIOATION FILED NOV 7, m2,

1 1 1 2,523. Patented Oct. 6, 191 1.

- SHEETS-SHEET 1. z'a

z/Mw A. G. CLARK. VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED Nov. 7, 1O1'2v Patented Oct. 6,, 1914.

4 :SHEETS-SHEET 2. 7

MW af@j Veil for filexander (742%:

Mli'hesses 4m eyJ- A. G. CLARK. VALVE FOR INTERNAL COMBUSTION ENGINE" APPLIOATION FILED NOV. 7, 1912.

1,1 12,523. Piatented Oct. 6, 1914.

4 SHEETS-SHEET 3.

A. G. CLARK. VALVE 1'01: INTERNAL COMBUSTION ENGINES.

APPLICATION FILED NOV. 7, 1912.

Patented Oct. 6, 1914 4 SHEETS-311151511.

p-ii

'zin l exhaust ports, only a por ion of Application filed Hevemb er 7.

T 0 all whom may concern Be it known that 1, A3 CLARK, a subject of the King of sin, residing at 153 lilelrose av don Park, in the county of Sun have invented certain new and use provenients in or Relating to ternal- Combustion Engines. L. following is a specification.

This invention relates to re ing valves for internal coinbit of the kind in which the speed of rotation less then one half of the crank izli: and in which the external inl *1 and iausu ports are arranged side by side in the valve casing or and the inter-in l inlet haust ports which coininunicir working cylinders are arr Cally opposite each other in i, in engines of this kind ha and exhaust ports arranged. as the length of the internal i ports communicating wi inders is of necessity linnte diameter of the cylinders dependent upon the diameter casing. The ports leading t-e inlet and exhaust passages are he. restricted as regards their length 1 the distance existing between the long 'm. .el of the Working cylinders While their Width is dependent upon the diameter of valve and its casing which it is desirable to keep as small as possible. Therefore in order to obtain the necessary aresoi the ports leading to the e.' .nal inlet and exhaust essages I make them considerably lo e the internal diameter of the Work ,5 crim (lei-s, that is to they may lens the ports in the valve casing. ever the length oi. the valve a l greater than the length or the ifllQlflR:

\tllYL poi-ls can register with the ext. inlet and exhaust iorls. tscreiiore necessnrv in order to obtain satisfactory Working or the engine, that this restriction in elfective port area shall be avoided and it is the chief object of my invention to provide means for accomplishing that result.

According to this invention the valve. body I is providedwith a plurality of radial psi. sages "which communicate with each other in the hody of the valve and which are so disposed that when one of the said passages Sneeification of 31187.2.-

Patented Get. 8,

rs with the external inlet or exhaust port uilicient number oi the other passages will clust r with the working cylinder to insure h t t e total ei'i'eclive area of the valve ports er shall be equal to or not; less he arcs of the valve pore registering 1th the port or passage communicating with the external. inlet or exhaust pi The disoositien of the aforesaid redial ncssae'es '0 communication with the Working c lincler according the engine is performi the exhaust or the suc ion stroke, While the compression and working strokes orts are the. sad external. exhaust or inlet coiercd and therefore walls of the valve cas' or i; e ports in the valve casing or seal; leedine' to he ing cylinder are clianietrice l lid and are of the same enev to the explosive rorce, whereby the. re-

illl(ll.'lCZll valve body are ezii'oosed simul X ()LHi suiting pressures on the said valve body are balanced as is Well understood. 13y arranging these ports so that. their axis is more or less displaced from coincidence with the dienie'ter 01 the valve body, I can provide for a certain degree of preponderating pressure acting in a direction to keep the valve body .firmly pressed toward the inlet and exhaust ports in the valve casing when the explosions occur, thus preventing any leakage from taking place owing" to Wear 01' the valve and or In order that the said. invention may he *leerlv understood rind readily carried into li'ect the some will now he described more ull with reference 510 the accompanying re wings in which Figure 1 is. a sectional elevation of a four cylinder vertical engine provided with one form of the improved rotary valve. Fig. 2 is a transverse section when on the ine ll of Fig. 1. is a transverse il'lll'lll showing a modified arrangement of he valve illustrated in Figs. 1 and .2. Figs. '0 G are transverse sections similar to Fig. .howing modifications of the valve. Fig. is El vertical section through the valve vhnmher of a two cylinder engine with the valve removed to showv ihe disposition of 1 ifglfitelillg with the 'oessages leading to the longitudinal passages or cavities the ports eonnnunicatingwith the working cylinders and the external inlet and exhaust pipes.

Like letters of reference indicate similar parts in all the figures.

A A. are the cylinders provided with passages A for the reception of spark plugs or fuel injection valves and A." A are the water jackets surrounding the cylinders A" is the cavity or casing forming the valve seat for the cylindrical rotary valve B.

Referring first more particularly to Figs. 1, 2 and 3, the rotary valve B is disposed transversely with respect to the axes of the working cylinders, and is in one piece mounted in the valve seat A" which in Figs. 1 and 2 extends horizontally above the com bustion chambers of the various cylinders and in Fig. 8 extends horizontally along one side of the said cylinders. The said valve, body is provided with four sets of ports, one set for each cylinder, each set comprising in the particular examples now being described, four passages h b 25 79 which extend transversely through the valve body. a a and c a are the two pairs of peripheral ports in the valve casing; the ports a a being the internal ports coinniunicating with the worlring cylinder and the ports a a being the ports communieating with the exterior inlet and exhaust.

the valve body which cooperate with the ports a," a a a The sets of ports in the valve body are placed at different angular positions relatively to each other so as to pro vide for the correct timing or the inlet and exhaust of the different cylinders. llhe ports a 2 are diametrically arranged wih respect to each other and communicate w h the working cylinders through passages a and a, the said ports being adapted to enpose equal areas of the valve on each side, so that when the explosion takes place in the cylinder at each firing stroke, the repassages. 72 h h h are the passages in ,sulting forces acting upon the valve are balanced as is well understood. The ports 1, and a lie side by side in a position more orless at right angles to the "plane passing through the ports a and a n Figs. 1 and 2 the said passages a; a communicate separately with thecylinder but in Fig. 3 they communicatewith the cylinder through. a single opening (5 which is common to-the two passages. The ports a 0t communicate with the inlet and exhaust pipes A A through the passages a a h h are in the valve body for the circulation of the cool.- ing water or it may he air which may be caused to flow through hese spaces by a tan or by the suction if thegengine, and on'leaving the valve in a heated condition may be advantageously passed through the carburetor to assist in vaporizing the incl.

races tight fit for the valve in its casing or seat.

Continuous rotary motion is in the example shown imparted to the valve body by a worm wheel 72 keyed to one end thereof and meshing with a worm mounted on a shaft 5 which is driven from the crank shaft of the engine through appropriate gearin v in the position in which the valve and the piston are represented in Figs. 2 and o, the piston is about to perform its downward working stroke and the valve has cons" pletely closed the pair of ports a and a cmnmunicating with the cylinder and also the pair of ports a and a communicating with the inlet and exhaust pipes. The valve is intended to revolve in a clockwise direction as shown by the arrow. l i hcn the ton reaches the extremity oi? its working stroke or thereabout, the valve will hae moved through an angular distance suiticient to'bring the passage, 6* therein into communicatioi-i with the exhaust port and the passages 32'' and 15 into coniuiunica tion with the cylinder ports and a, the passage remaining closed; the piston is thus able to expel the exhaust gases throu h the cylinder ports a of and the exhaust port a as it performs its upward or sca enging stroke. At the neat downward or suction stroke of the piston the valve will bring the passage 5 opposite the inlet port a while the assav'es h and F) still remain a in coinnnuiication with the cylinder ports 2 and a, and the passage 6 still remains closed; the explosive charge is thus able to enter the cylinder from the inlet port a, through the cylinder sorts a (1?. ll l'ien the piston reaches the end of its suot'ui stroke or thercabout the valve will have brought all the passages in the valve body into a position in which they a e closed by the valve seat, so that on the return stroke of the piston, the charge within. the cylinder Li ti lllt will be compressed and firing will take place ill 011161 to eiiect another working stroke of the piston. From. this point the-cycle of operations is repeated, the valve body moving through an angle of during each cycle and revolving at a speed which is one eighth that of the engine crank chart In the foregoing description l have explained the action of the valve in connection with only one of the cylinders; it will oi: course be understood that a similar cycle of op ations takes place in coni'icction with etoi the other cylinders the relative or position oi? the various sets otports in the Li o it 3 it we ena (K am compresmov 5. into a m 010% duruflve win conthe anneaabove (16- cyisle 01 operations of new t" I 1i rcwalu-tion metal b H (each am 121 much we =g11e1- must ports in .ng iis the compl ke and dur- 3 (m in bring the pasmust port a and the 9 the cylinder port (1. the mining closed. AS the smwengim stroke, the 5 pnsition in ,n'ing its pasiniet port a and its 9 e vylinder port a, the' "\5 mixture is drawn into k wring the ensuing snctlon 5 A. Q n, ()nthe commencement w Liv f the plstun i. e. the comm, U1 mix '0 mli have moved to close the inhet and exhaust n 5&1 LA 11.10 MLXE ram.

dear? am: 13?. own in 1.; rpr'xEm-rivai valve body Y H; lmerumnmnnicating g tram, ra iv Mnough it arra ged aqn 'tzmtly and mine 01' app itely the 115 1 of a cylindrical valve 1' 01" penphemi gm? 21,11 meleetending transversely through it with their end of the Working cylinder and means for four ports arranged. equlcllstently and all lmparting continuous rotary motlon to said lylng 1n the same transverse plane, of e cyvalve body from the englne shaft at one linclrical valve casing 01' seat having two eighth of the speed of the latter. 1 5, 5 pmrs oji perlpheral ports one pan belng :11- In testnnony whereof I al'fix my signature ranged side by side and commumcatlng re- 1n presence of two W1tnesses.

s ectivel with the inlet and exhaust i es 0 cendu l te and the other pair arrange ii- ALEXANDER GRAHAM ametrically or a pprpxinmtely diametrically Witnesses: 10 opposite each other, and communicating with T. SELBY VTARDLE,

' passages extending-from one and the same J. PHILLIPS CRAWLEY. 

